Mitsubishi Electric MELSEC FX3U Programming Manual page 577

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
2 : When using a special high speed output adapter for the pulse output destination in an FX
rotation direction signal must be used by the following table output.
When using a built-in transistor output for the pulse output destination in an FX
rotation direction signal must use transistor output.
Special high speed output adapter No.
No. 1 (1st unit)
No. 2 (2nd unit)
3 : "D .b" cannot be indexed with index registers (V and Z).
Explanation of function and operation
Command
input
FNC151
DVIT
Caution on writing during RUN
During RUN, avoid writing while the DVIT (FNC151) instruction is executed (that is, while a pulse is output).
Note that if writing is executed during RUN to a circuit block including the FNC151 instruction while pulses are
output, the PLC decelerates and stops pulse output.
Function change depending on the version
The functions of FNC151 instruction are changed depending on the version as shown in the table below.
Applicable version
FX
3U
Ver.2.20 or Ver.1.30 or
later
Ver.2.20 or Ver.2.20 or
later
S S D
1 2 1
→ For explanation of the instruction and the contents of function change,
Item
FX
3UC
Interrupt input signal
later specification function
User interrupt mode
later
20 Positioning Control – FNC150 to FNC159
20.2 FNC151 – DVIT / Interrupt Positioning
Pulse output Rotation direction output
=Y000
D
D
2
1
=Y001
D
D
2
1
=Y002
D D
2
1
=Y003
D
D
2
1
D
2
refer to the Positioning Control Edition.
Outline of function
When M8336 is set to ON, the interrupt input signal corresponding to
Y000 to Y003 is changed to an input number (X000 to X007)
specified by D8336.
When using a transistor output in the main unit, Y003 cannot be
specified.
When "8" is specified by D8336 to the interrupt input signal
corresponding to Y000 to Y003 and M8336 is set to ON, the interrupt
input signal is changed to a special auxiliary relay.
changed special auxiliary relay is set to ON from OFF in an input
interrupt program, the PLC starts the interrupt operation. When this
function is used, however, the logic of the interrupt input cannot be
inverted.
In addition, when using a transistor output in the main unit, Y003
cannot be specified.
PLC, the
3U
/FX PLC, the
3U 3UC
=Y004
=Y005
=Y006
=Y007
When this
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